Suzuki Grand Vitara JB416 / JB420. Manual - part 50

1A-149 Engine General Information and Diagnosis: 

6

Wire circuit check
1) Measure voltage between “RED/BLK” wire terminal of 

radiator cooling fan relay No.1 connector and vehicle 
body ground with ignition switch turned ON.

Is voltage 0 V?

Go to Step 7.

“RED/BLK” wire is 
shorted to other circuit.

7

Wire circuit check
1) Measure resistance between “RED/BLK” wire terminal of 

radiator cooling fan relay No.1 connector and “E23-46” 
terminal of ECM connector with ignition switch turned 
OFF.

Is resistance below 2 

Ω

?

Go to Step 20.

“RED/BLK” wire is open 
circuit.

8

Wire circuit check
1) Disconnect connectors from ECM with ignition switch 

turned OFF.

2) Measure voltage between “E23-47” terminal of ECM 

connector and vehicle body ground with ignition switch 
turned ON.

Is voltage 10 – 14 V?

Go to Step 9.

Go to Step 10.

9

Radiator cooling fan control No.2 check
1) Connect connectors to ECM with ignition switch turned 

OFF.

2) Run engine until ECT is over 102.5 

°C, 216.5 °F.

3) Measure voltage between “E23-47” terminal of ECM 

connector and vehicle body ground.

Is voltage below 1.5 V?

Go to Step 14.

Substitute a known-
good ECM and recheck.

10 Wire circuit check

1) Disconnect radiator cooling fan relay No.2 (1) from relay 

box (2) with ignition switch turned OFF.

2) Turn ON ignition switch.
3) Measure voltage between “YEL/GRN” wire terminal of 

radiator cooling fan relay No.2 connector and vehicle 
body ground. 

Is voltage 10 – 14 V?

Go to Step 11.

“YEL/GRN” wire is open 
circuit.

11 Wire circuit check

1) Measure resistance between “RED” wire terminal of 

radiator cooling fan relay No.2 connector and vehicle 
body ground with ignition switch turned OFF.

Is resistance infinity?

Go to Step 12.

“RED” wire is shorted to 
ground circuit.

Step

Action

Yes

No

2

1

I5JB0A110058-02

Engine General Information and Diagnosis:  1A-150

12 Wire circuit check

1) Measure voltage between “RED” wire terminal of 

radiator cooling fan relay No.2 connector and vehicle 
body ground with ignition switch turned ON.

Is voltage 0 V?

Go to Step 13.

“RED” wire is shorted to 
other circuit.

13 Wire circuit check

1) Measure resistance between “RED” wire terminal of 

radiator cooling fan relay No.2 connector and “E23-47” 
terminal of ECM connector with ignition switch turned 
OFF.

Is resistance below 2 

Ω

?

Go to Step 20.

“RED” wire is open 
circuit.

14 Wire circuit check

1) Disconnect connectors from ECM with ignition switch 

turned OFF.

2) Measure voltage between “E23-48” terminal of ECM 

connector and vehicle body ground with ignition switch 
turned ON.

Is voltage 10 – 14 V?

Go to Step 15.

Go to Step 16.

15 Radiator cooling fan control No.3 check

1) Connect connectors to ECM with ignition switch turned 

OFF.

2) Run engine until ECT is over 102.5 

°C, 216.5 °F.

3) Measure voltage between “E23-48” terminal of ECM 

connector and vehicle body ground.

Is voltage below 1.5 V?

Intermittent trouble.
Check for intermittent 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 
00”.

Substitute a known-
good ECM and recheck.

16 Wire circuit check

1) Disconnect radiator cooling fan relay No.3 (1) from relay 

box (2) with ignition switch turned OFF.

2) Turn ON ignition switch.
3) Measure voltage between “YEL/GRN” wire terminal of 

radiator cooling fan relay No.3 connector and vehicle 
body ground.

Is voltage 10 – 14 V?

Go to Step 17.

“YEL/GRN” wire is open 
circuit.

17 Wire circuit check

1) Measure resistance between “RED/YEL” wire terminal of 

radiator cooling fan relay No.3 connector and vehicle 
body ground with ignition switch turned OFF.

Is resistance infinity?

Go to Step 18.

“RED/YEL” wire is 
shorted to ground 
circuit.

Step

Action

Yes

No

1

2

I5JB0A110059-02

1A-151 Engine General Information and Diagnosis: 

DTC P0500: Vehicle Speed Sensor (VSS) Malfunction

S5JB0A1104049

Wiring Diagram

DTC Detecting Condition and Trouble Area

18 Wire circuit check

1) Measure voltage between “RED/YEL” wire terminal of 

radiator cooling fan relay No.3 connector and vehicle 
body ground with ignition switch turned ON.

Is voltage 0 V?

Go to Step 19.

“RED/YEL” wire is 
shorted to other circuit.

19 Wire circuit check

1) Measure resistance between “RED/YEL” wire terminal of 

radiator cooling fan relay No.3 connector and “E23-48” 
terminal of ECM connector with ignition switch turned 
OFF.

Is resistance below 5 

Ω

?

Go to Step 20.

“RED/YEL” wire is open 
circuit

20 Radiator cooling fan relay check

1) Check radiator cooling fan relay referring to “Radiator 

Cooling Fan Relay Inspection in Section 1F”.

Is it in good condition?

Substitute a known-
good ECM and recheck.

Replace relay.

Step

Action

Yes

No

E23-4

E23-19

WHT/RED

WHT/BLU

WHT/RED

WHT/BLU

E23

C37

3

4

18

19

5

6

7

10

11

17

20

47

46

49

50

51

21

22

52

16

25

9

24

14
29

55

57

54 53

59

60

58

2

26

27

28

15
30

56

48

32

31

34

35

36

37

40

42

39 38

44

45

43

41

33

1

12

13

23

8

3

4

18

19

5

6

7

10

11

17

20

47

46

49

50

51

21

22

52

16

25

9

24

14
29

55

57

54 53

59

60

58

2

26

27

28

15
30

56

48

32

31

34

35

36

37

40

42

39 38

44

45

43

41

33

1

12

13

23

8

BLK

WHT

BLK

WHT

YEL/BLK

YEL

LT GRN
LT GRN/BLK

12V

12V

1

2

3

4

I5JB0A110060-03

1. Rear left side wheel speed sensor (VSS 1)

3. ABS hydraulic unit / control module Assembly

2. Rear right side wheel speed sensor (VSS 2)

4. ECM

DTC detecting condition

Trouble area

• Vehicle speed signal is not input while fuel is cut at 

deceleration for 4 seconds continuously at 3600 rpm or 
less.

• Vehicle speed signal is not input even if engine is running 

with more than 3700 rpm at D-Range for 4 sec. (for A/T 
model).

(2 driving cycle detection logic)

• Wheel speed sensor (VSS)
• Wheel speed sensor circuit 
• ABS hydraulic unit / control module assembly
• ECM

Engine General Information and Diagnosis:  1A-152

DTC Confirmation Procedure

WARNING

!

 

• When performing a road test, select a place where there is no traffic or possibility of a traffic 

accident and be very careful during testing to avoid occurrence of an accident.

• Road test should be carried out by 2 persons, a driver and a tester.

 

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Warm up engine to normal operating temperature.
4) Drive vehicle at 4000 rpm (engine speed) with 3rd gear (for M/T vehicle) or “3” range (for A/T vehicle).
5) Release accelerator pedal and with engine brake applied, keep vehicle coasting for 6 sec. or more (fuel cut 

condition for 5 sec. or more) and stop vehicle.

6) For A/T model, drive vehicle at more than 3700 rpm for 10 sec.
7) Check pending DTC and DTC.

DTC Troubleshooting

NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to 
“Precautions For DTC Troubleshooting”.

 

Step

Action

Yes

No

1

Was “Engine and Emission Control System Check” 
performed?

Go to Step 2.

Go to “Engine and 
Emission Control 
System Check”.

2

Vehicle speed signal check

Is vehicle speed displayed on scan tool in Step 4) and 5) of 
“DTC Confirmation Procedure”?

Intermittent trouble.
Check for intermittent 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 
00”.

Go to Step 3.

3

DTC check in ABS hydraulic unit / control module 
assembly
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Check ABS hydraulic unit / control module assembly for 

DTC.

Is there any DTDC(s) in ABS hydraulic unit / control module 
assembly?

Go to applicable DTC 
diag. flow.

Substitute a known-
good ECM and recheck.